<div class="composition-layout">
    <div style="width:32%;height:100%;float: left;border-right: 1px solid #cccccc;">1</div>
    <div style="width:32%;height:100%;float: left;border-right: 1px solid #cccccc;">2</div>
    <div style="width:32%;height:100%;float: left;">3</div>
    <div style="clear:both;"></div>
</div>

